<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script>
    <script src="https://cdn.bootcdn.net/ajax/libs/dayjs/1.11.7/dayjs.min.js"></script>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css" integrity="sha384-xOolHFLEh07PJGoPkLv1IbcEPTNtaed2xpHsD9ESMhqIYd0nLMwNLD69Npy4HI+N" crossorigin="anonymous">
    <style>
        .red {
            color: red;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="container">
            <!-- 顶部搜索框模块 -->
            <div class="form-group">
                <div class="input-group">
                    <h4>品牌管理</h4>
                </div>
            </div>

            <!-- 数据表格 -->
            <table class="table table-bordered table-hover mt-2">
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>资产名称</th>
                        <th>价格</th>
                        <th>创建时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr v-for="item in list" :key="item.id">
                        <td>{{item.id}}</td>
                        <td>{{item.name}}</td>
                        <!-- 如果价格超过100，就有red这个类 -->
                        <td :class="{red:item.price>100}">{{item.price}}</td>
                        <td>{{ dateFormate(item.time) }}</td>
                        <td><a href="#" @click.prevent="del(item.id)">删除</a></td>
                    </tr>
                    <tr style="background-color: #EEE">
                        <td>统计</td>
                        <td colspan="2">总价:{{totalPrice.toFixed(2)}}</td>
                        <td colspan="2">均价:{{totalPrice/list.length||0}}</td>
                    </tr>
                </tbody>
                <tfoot>
                    <tr>
                        <td colspan="5" style="text-align: center">暂无数据</td>
                    </tr>
                </tfoot>
            </table>

            <!-- 添加资产 -->
            <form class="form-inline">
                <div class="form-group">
                    <div class="input-group">
                        <input type="text" class="form-control" placeholder="资产名称" v-model.trim="name" />
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <div class="form-group">
                    <div class="input-group">
                        <input type="text" class="form-control" placeholder="价格" v-model.number="price" />
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <!-- 阻止表单提交 -->
                <button class="btn btn-primary" @click.prevent="add()">添加资产</button>
            </form>
        </div>
    </div>

    <script>
        const app = new Vue({
            el: '#app',
            data: {

                name: "", // 名称
                price: 0, // 价格
                list: [{
                    id: 100,
                    name: "外套",
                    price: 199,
                    time: new Date('2010-08-12')
                }, {
                    id: 101,
                    name: "裤子",
                    price: 34,
                    time: new Date('2013-09-01')
                }, {
                    id: 102,
                    name: "鞋",
                    price: 25.4,
                    time: new Date('2018-11-22')
                }, {
                    id: 103,
                    name: "头发",
                    price: 19900,
                    time: new Date('2020-12-12')
                }]
            },
            methods: {
                del(id) {
                    this.list = this.list.filter(item => item.id !== id)
                },
                dateFormate(val) {
                    return dayjs(val).format("YYYY-MM-DD")
                },
                add() {
                    if (this.name === "" || typeof this.price != 'number') return alert('请填入正确的名字和价格')
                    this.list.push({
                        id: +new Date(),
                        name: this.name,
                        price: this.price,
                        time: new Date()
                    })
                    this.name = ""
                    this.price = ""
                }
            },
            computed: {
                totalPrice() {
                    return this.list.reduce((sum, item) => this.list.length ? sum + item.price : sum, 0)
                },
            },
            watch: {
                list: {
                    deep: true,
                    handler(newVal) {
                        localStorage.setItem("goodsList", JSON.stringify(newVal))
                    }
                }
            }
            //细节:

            // - 注意a标签有默认行为-跳转刷新页面(如果有href属性)
            // - 添加资产时, 提示用户数据不能为空
            // - form表单里的button的点击事件, 会触发默认表单提交的行为\


        })
    </script>
</body>

</html>